<template>
  <div>
    <div style="margin-bottom: 30px">
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品类别列表</el-breadcrumb-item>
      </el-breadcrumb>
    </div>

    <div style="margin: 10px 0">
      <el-input style="width: 200px" placeholder="请输入类别名称"
                v-model="cname" suffix-icon="el-icon-search"></el-input>
      <el-button class="ml-5" type="primary" @click="search">搜索</el-button>
      <el-button class="ml-5" type="warning" @click="reset">重置</el-button>
    </div>

    <div style="margin: 10px 0">
      <el-button type="primary" @click="handleAdd" class="mr-5">新增类别 <i class="el-icon-circle-plus-outline"></i>
      </el-button>
      <el-popconfirm
          confirm-button-text='确定'
          cancel-button-text='再想想'
          icon="el-icon-info"
          icon-color="red"
          title="确定批量删除吗？"
          @confirm="delBatch">
        <el-button type="danger" slot="reference" class="mr-5">批量删除<i class="el-icon-remove-outline"></i></el-button>
      </el-popconfirm>
    </div>
    <el-table :data="tableData.slice(startIndex,startIndex+pageSize)" border stripe
              @selection-change="handleSelectionChange">
      <el-table-column
          type="selection"
          width="55">
      </el-table-column>
      <el-table-column prop="cid" label="id" width="140">
      </el-table-column>
      <el-table-column prop="cname" label="类别名称" width="120">
      </el-table-column>
      <el-table-column prop="description" label="类别描述">
      </el-table-column>
      <el-table-column label="操作" width="500px" align="center">
        <template slot-scope="scope">
          <el-button type="success" @click="handleEdit(scope.row)" class="mr-5">
            编辑<i class="el-icon-edit"></i>
          </el-button>
          <el-popconfirm
              confirm-button-text='确定'
              cancel-button-text='再想想'
              icon="el-icon-info"
              icon-color="red"
              title="确定删除吗？"
              @confirm="del(scope.row.cid)">
            <el-button type="danger" slot="reference">删除 <i class="el-icon-remove-outline"></i></el-button>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>
    <div style="padding: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :page-sizes="[5, 10, 15, 20]"
          :page-size=pageSize
          layout="total, sizes, prev, pager, next, jumper"
          :total=total>
      </el-pagination>
    </div>
    <!--    类别信息的弹窗    -->
    <el-dialog title="商品类别信息" :visible.sync="dialogFormVisible" width="30%">
      <el-form :model="category" :rules="rules" ref="category">
        <el-form-item label="类别名称" label-width="120px" prop="cname">
          <el-input v-model="category.cname" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="类别详细描述" label-width="120px" prop="description">
          <el-input v-model="category.description" autocomplete="off" type="textarea" clearable autosize></el-input>
        </el-form-item>

      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible=false">取 消</el-button>
        <el-button type="primary" @click="save('category')">{{ btnText }}</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import request from "@/utils/request";

export default {
  name: "Category",
  data() {
    return {
      tableData: [],
      startIndex: 0,
      cname:"",
      description: "",
      pageSize: 5,
      total: 0,
      dialogFormVisible: false,
      btnText: "",
      category: {},
      multipleSelection: [],
      rules: {
        cname: [
          {required: true, message: '请输入类别名称', trigger: 'blur'},
        ],
        description: [
          {required: true, message: '请输入类别详细描述', trigger: 'blur'},
        ]
      },
    }
  },
  created() {
    this.load()
  },
  methods: {
    load() {
      request.get("/category/findall").then(res => {
        this.tableData = res
        this.total = this.tableData.length
        this.startIndex=0
      })
    },
    handleSizeChange(pageSize) {
      this.pageSize = pageSize
    },
    handleCurrentChange(pageNum) {
      this.startIndex = (pageNum - 1) * this.pageSize
    },
    handleAdd() {
      this.btnText = "添加"
      this.category = {}
      this.dialogFormVisible = true
    },
    handleEdit(row) {
      this.btnText = "修改"
      this.dialogFormVisible = true
      this.category = Object.assign({}, row)
      console.log(this.category)
    },
    save(category) {
      this.$refs[category].validate((valid) => {
        if (valid) {
          this.dialogFormVisible = false
          request.post("category/save",this.category).then(res=>{
            if (res){
              this.$message.success(this.btnText + "成功")
              this.load()
            }else {
              this.$message.error(this.btnText + "失败")
            }
          })
        } else {
          console.log('error submit!!');
          return false;
        }
      });
    },
    del(id) {
      request.post("category/delete",id).then(res=>{
        if (res){
          this.$message.success( "删除成功")
          this.load()
        }else {
          this.$message.error( "删除失败")
        }
      })
      console.log(id)
    },
    handleSelectionChange(val) {
      // console.log(val)
      this.multipleSelection = val
    },
    delBatch() {
      //map函数：数组的每个元素都执行一个给定的函数，返回值仍为一个数组
      let ids = this.multipleSelection.map(v => v.cid)
      if(ids.length!==0){
        request.post("category/deleltebatch",ids).then(res=>{
          if (res){
            this.$message.success( "批量删除成功")
            this.load()
          }else {
            this.$message.error( "批量删除失败")
          }
        })
      }else {
        this.$message.warning( "请选择要删除的数据")
      }
    },
    search(){
      request.get("/category/selectbycondition",{
        params:{
          cname:this.cname,
          description:this.description,
        }
      }).then(res => {
        this.tableData = res
        this.total = this.tableData.length
        this.startIndex=0
      })
    },
    reset(){
      this.cname=""
      this.description=""
      this.load()
    }
  }
}
</script>

<style scoped>

</style>